Sulfamic acid

Sulfamic acid
Ball-and-stick model of the canonical neutral form	Ball-and-stick model of the zwitterionic form
Names
	IUPAC name Sulfamic acid
Identifiers
CAS Number	5329-14-6 ;
3D model (JSmol)	Interactive image; zwitterion: Interactive image;
ChEBI	CHEBI:9330 ;
ChEMBL	ChEMBL68253 ;
ChemSpider	5767 ;
ECHA InfoCard	100.023.835
EC Number	226-218-8;
Gmelin Reference	25628
PubChem CID	5987;
RTECS number	WO5950000;
UNII	9NFU33906Q ;
UN number	2967
CompTox Dashboard (EPA)	DTXSID6034005 ;
	InChI InChI=1S/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4) Key: IIACRCGMVDHOTQ-UHFFFAOYSA-N ; InChI=1/H3NO3S/c1-5(2,3)4/h(H3,1,2,3,4) Key: IIACRCGMVDHOTQ-UHFFFAOYAK;
	SMILES O=S(=O)(O)N; zwitterion: O=[S](=O)([O-])[NH3+];
Properties
Chemical formula	H3NSO3
Molar mass	97.10 g/mol
Appearance	white crystals
Density	2.15 g/cm3
Melting point	205 °C (401 °F; 478 K) decomposes
Solubility in water	Moderate, with slow hydrolysis
Solubility	Moderately soluble in DMF; Slightly soluble in MeOH; Insoluble in hydrocarbons;
Acidity (pKa)	1.0
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H319, H412
Precautionary statements	P264, P273, P280, P302+P352, P305+P351+P338, P321, P332+P313, P337+P313, P362, P501
Safety data sheet (SDS)	ICSC 0328
Related compounds
Other cations	Ammonium sulfamate
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Sulfamic acid, also known as amidosulfonic acid, amidosulfuric acid, aminosulfonic acid, sulphamic acid and sulfamidic acid, is a molecular compound with the formula H₃NSO₃. This colourless, water-soluble compound finds many applications. Sulfamic acid melts at 205 °C before decomposing at higher temperatures to water, sulfur trioxide, sulfur dioxide and nitrogen.^[2]

Sulfamic acid (H₃NSO₃) may be considered an intermediate compound between sulfuric acid (H₂SO₄), and sulfamide (H₄N₂SO₂), effectively replacing a hydroxyl (–OH) group with an amine (–NH₂) group at each step. This pattern can extend no further in either direction without breaking down the sulfonyl (–SO₂–) moiety. Sulfamates are derivatives of sulfamic acid.

^ Candlin, J. P.; Wilkins, R. G. (1960). "828. Sulphur–nitrogen compounds. Part I. The hydrolysis of sulphamate ion in perchloric acid". Journal of the Chemical Society (Resumed): 4236–4241. doi:10.1039/JR9600004236.
^ Yoshikubo, K.; Suzuki, M. (2000). "Sulfamic Acid and Sulfamates". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1921120625151908.a01. ISBN 0471238961.

[1] Candlin, J. P.; Wilkins, R. G. (1960). "828. Sulphur–nitrogen compounds. Part I. The hydrolysis of sulphamate ion in perchloric acid". Journal of the Chemical Society (Resumed): 4236–4241. doi:10.1039/JR9600004236.

[kirk-othmer-2] Yoshikubo, K.; Suzuki, M. (2000). "Sulfamic Acid and Sulfamates". Kirk-Othmer Encyclopedia of Chemical Technology. doi:10.1002/0471238961.1921120625151908.a01. ISBN 0471238961.

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